Model TR-525 Series Rainfall Sensors
DESCRIPTION
The sensor consists of a gold anodized aluminum collector funnel with a knife-edge that diverts the water to a tipping
bucket mechanism. The models TR-525I and TR-525USW are calibrated in inches (.01” per tip) and model TR-525M is
calibrated in millimeters (.1mm per tip). A magnet is attached to the tipping bucket, which, as the bucket tips, actuates a
magnetic switch. Thus, a momentary switch closure takes place with each tip of the bucket. Connecting the sensor to an
event counter on an electronic datalogger or display module will allow record keeping of accumulated rainfall. If an
analog signal representing rainfall accumulation is required, Texas Electronics, Inc. manufactures a suitable conditioning
circuit.
The spent water drains out of the bottom of the housing; hence, the sensor requires no attention or servicing of any sort. It
is completely automatic. The aluminum sensor housing is finished with a white baked enamel paint to withstand years of
exposure to the environment.
Specifications
Resolution:
0.01” or 0.1mm
English
1.0% at 1”/hr or less
Average Switch Closure Time: 135 ms
Maximum Switch Rating:
30 VDC @ 2A, 115 VAC @ 1 A
Humidity Limits:
0 to 100%
Weight:
2.5 pounds
9.664” (Metric)
Cable:
25’, 24 Gauge 2 conductor
securing the side bracket to a stable vertical structure such as the lower
equipment.
Warranty:
3 years
Accuracy:
Metric
1.0% at 10 mm/hr or less
Maximum Bounce Settling Time:
0.75 ms
Temperature Limits:
+32°F to +125°F
Height:
10.125”
Receiving Orifice Diameter:
6.060” (English)
8.000” USW (English)
Installation:
Consists of attaching the three sensor support legs to a firm platform or
end of weather station mast. Sensor cable is then connected to monitoring
Maintenance:
Occasional cleaning of debris from filter screen may be required.